TY - JOUR AU - S. Czerwik TI - Continuous solutions of a functional equation JO - Matematic̀Œki vesnik PY - 1975 SP - 241 VL - 27 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MV_1975_27_1_a27/ ID - MV_1975_27_1_a27 ER -